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Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sericulture has a pivotal position in the agricultural production of China. The number of silkworms is one of the key indicators in the process of silkworm breeding, which is crucial to the feeding and healthy growth of silkworms. Accurate detection of the number of silkworms can ensure the quality of sericulture products. However, manual counting has not fully met the needs of large-scale production in recent years. There is a high demand to combine AI technology for silkworm counting. In this study, silkworm detection and counting were studied from the perspective of deep learning. Several challenges were solved in the detection of silkworms. Since the silkworms belonged to the small targets, it was difficult to detect the fewer features; When the number of silkworms was high, serious masking occurred to cause interference in the detection of densely distributed silkworms; It was difficult to ensure that the clear images of silkworms were captured from the actual production. The blur images were easy to deteriorate the accuracy of detection. Two tasks were covered as follows. 1) The image dataset of silkworms was constructed; 2) MAM-YOLO, a silkworm detection and counting model was proposed using multi-dimensional perception. The pictures of silkworms were first taken from the Guangxi Sericulture Technology Promotion Station. These pictures of silkworms were preliminarily processed. The polygon annotation was then selected, according to the body and distribution of silkworms. The pictures of silkworms were annotated with the open-source tool (Labelme). Finally, the dataset was expanded using image transformation and noise addition. The silkworm picture dataset was obtained for the subsequent training, verification, and testing. An improved YOLOv8 (MAM-YOLO) was proposed to detect the silkworm, in order to realize the accurate detection and counting. A silkworm detection and counting model was proposed using space-to-depth transformation and image deblurring. The fine-grained detection performance of blurred images was improved in the MAMYOLO model. The space-to-depth transformed convolution was utilized instead of stride convolution for the pooling layer in the feature extraction. The fine-grained features were extracted from the images, in order to further improve the detection of the low-resolution and small targets. In addition, the impact of blurred images on the detection performance was reduced by introducing a deblurring module into the model. RCS-OSA module was added to the YOLOv8 model. The network feature extraction was improved to integrate the information of different sizes in the receptive fields. The detection head of the original network was improved into the multi-dimensional sensing head. The three-dimensional features of size, space, and channel were aggregated to enhance the detection of silkworm targets. The loss function was replaced with the EIOU loss function. The regression accuracy of the detection frame was improved to reduce the object occlusion. Experimental results show that the MAM-YOLO more accurately detected the silkworm targets. The detection speed of mAP@0.5:0.95 reached 74.8% and 22.2 frames per second, indicating the better functions of silkworm detection and counting with high precision and high rate. The detection requirements were fully met in the actual work of the Guangxi sericulture station. The results show that the silkworm detection and counting system of the technical indicators met the application requirements. The finding can provide the detection services for the actual production work of the silkworm breeding station. In the end, a generalization experiment was conducted on the Global Wheat Challenge 2021 dataset. It was found that the MAM-YOLO was also achieved in the better detection performance of wheat ears, particularly on the small targets similar to dense occlusion.Sericulture has a pivotal position in China's agricultural production. The number of silkworms is a key indicator in the process of silkworm breeding, which is crucial to the feeding and healthy growth of silkworms, and accurate detection of the number of silkworms can ensure the quality of sericulture products. The traditional way of counting silkworms manually is inefficient, and it needs to be combined with technology to intelligently complete this kind of heavy work. In this thesis, from the perspective of deep learning, a silkworm detection and counting method is studied, and several problems in silkworm detection are solved: silkworms belong to small targets, which have fewer features so that they are not easy to detect; silkworms are densely distributed, and when the number of silkworms is high, serious masking phenomenon occurs which causes interference in the detection; it is difficult to ensure that the images of silkworms obtained in the actual production are clear, and blur images will make the detection affected. The main research content of this thesis is as follows: This chapter completed two main tasks: 1) Completed the production of silkworm image data set; 2) MAM-YOLO, a silkworm detection and counting model based on multi-dimensional perception, was proposed.In this paper, pictures of silkworms were taken by workers from Guangxi Sericulture Technology Promotion Station. First, these pictures of silkworms were preliminically processed. Then, according to the characteristics of the body and distribution of silkworms, the polygon annotation method was selected, and the pictures of silkworms were annotated with the open-source tool Labelme. Finally, the data set is expanded by means of image transformation and noise addition, and finally the silkworm picture data set is obtained for subsequent training, verification and testing.This chapter proposes an improved silkworm detection method based on YOLOv8, MAM-YOLO, which realizes accurate detection and counting of silkworm. Secondly, aiming at the problems of loss of fine-grained information and poor detection performance of blurred images in the MAM-YOLO model, a silkworm detection and counting model based on spaceto-depth transformation and image deblurring is proposed. The model utilizes space-to-depth transformed convolution instead of stride convolution and pooling layer in the feature extraction process, so that fine-grained features in the image can be extracted, which further improves the detection capability for low-resolution and small targets. In addition, the impact of blurred images on the detection performance is reduced by introducing a deblurring module into the model. By adding RCSOSA module to YOLOv8 model, the capability of network feature extraction is improved, and the information of different size receptive fields is integrated. The detection head of the original network is improved into multi-dimensional sensing head, and the three-dimensional characteristics of size, space and channel are aggregated to enhance the detection ability of silkworm targets. By replacing the loss function with EIOU loss function, the regression accuracy of detection frame is improved and the problem caused by object occlusion is reduced. Experiments show that MAM-YOLO can more accurately detect silkworm targets, and the detection speed of mAP@0.5:0.95 reaches 74.8% and 22.2 frames per second, which realizes the functions of silkworm detection and counting with high precision and high rate, and can meet the detection requirements in the actual work of Guangxi sericulture station. results show that the silkworm detection and counting system of the technical indicators have met the application requirements, and can provide detection services for the actual production work of silkworm breeding station.In the end, a generalization experiment was conducted on the Global Wheat Challenge 2021 data set, and it was found that MAM-YOLO also showed a high improvement in the detection performance of wheat ears, proving that the proposed method can generalize to other small targets similar to dense occlusion. [ABSTRACT FROM AUTHOR]

The mobile flume has the advantages of not easy to be silted up and can be moved and reused in many places, etc. Compared with the fixed type, the streamlined shape of the measuring flume has good hydraulic performance, and the diffusion section of the flume has a great influence on the hydraulic performance, however, there is a lack of research on the design principle and method of the diffusion section at present. In order to study the influence of flume structure on hydraulic properties, and to provide theoretical guidance for the design of streamlined flume structure, This paper establishes a D40Ushaped channel simulation model, and then uses FLOW-3D to simulate the semi-elliptical with semi-elliptical, semi-elliptical with parabolic, semi-elliptical with arc, semi-elliptical with Myring curve, and fish-shaped flume under flow rates of 35, 45, and 55 L/s. Furthermore, the accuracy effect of numerical simulation is verified by prototype test, and then the design principle and method of diffusion section are discussed. Finally, based on the isight platform, the semi-elliptical with Myring curve and fish-shaped flume with better hydraulic performance are optimized. The results show that the relative error between the numerical simulation and the experimental water depth is 0.1%-1.3% and the relative errors of velocity in upstream, throat and downstream sections are 0.19%-6.63%, 0.06%-6.15% and 0.02%-6.22% at 45 L/s flow rate, respectively. The numerical simulation results have high accuracy. The Froude number in the upstream of the five flumes is less than 0.5, and the maximum backwater height is 5.71 cm, which meets the requirements of flow measurement accuracy and channel safety. Among them, the head loss and backwater height of the semi-elliptical with Myring curve flume are the lowest, the critical submergence degree of the semi-elliptical with semi-elliptical flume is the highest, and the Froude number is the smallest. The design principle of the diffusion section of the flume is: under the condition of slightly reducing the critical submergence degree, the first half of the diffusion section is designed as a curve with larger curvature to reduce the upstream backwater; the second half is designed as a curve with opposite curvature and smaller curvature to improve the flow state, smooth the water flow and reduce the head loss. After optimization, the curvature of the first half of the semi-ellipse with Myring curve and the fish-shape flume increases, and the curvature of the second half decreases, the backwater and Froude number are reduced, and the head loss is reduced by 5.5% and 6.3%, respectively. The study can provide theoretical guidance for the design and optimization of streamlined measuring tank structures. [ABSTRACT FROM AUTHOR]

The newly built oil terminal in a certain port is an offshore type, which adopts the method of a cross-channel buried subsea pipelines, connected to the shore, and the subsea pipeline needs to be protected by backfilled protection overlay. Based on the DNV series specifications, the up-heave buckling, settlement, anti-floating, and impact energy absorption of the pipeline were analyzed, and the thickness, composition and backfill parameters of the protection overlay were determined, to ensure that the pipeline is not damaged during construction and the in-place situation is stable during operation. The construction technology comparison, detail construction method and implementation effect of the protection overlay of the subsea pipeline were described. The practice proves that the design of the subsea pipeline protection overlay is reasonable and the selected construction method is suitable, which can be used as reference for similar projects. [ABSTRACT FROM AUTHOR]

In order to study the increase in capacity of Sanmenxia and Xiaolangdi sediment discharge without reducing the flood carrying capacity of the lower reaches of the Yellow River, by making full use of the water and sediment information of the lower reaches of the Yellow River, the information of the river statistic siltation cross-section, and the method of analysis of the dangerous water scale information, we analyzed the recovery of the flushing of Sanmenxia and Xiaolangdi reservoirs in the three years with the largest sediment discharge from 2018 to 2020, the flushing and siltation of the sediment quantity method in the lower reaches of the Yellow River during the flood period, the section method in the longitudinal and lateral scouring and siltation, water level with the same flow and variation of bankfull discharge in the Yellow River. The results show that by silting the reservoir discharge in the wide channel with large sediment capacity in the lower Yellow River during the sediment discharge period and gradually scouring the silt away in other periods, the flood carrying capacity of the river channel below Gaocun is not only not decreased but also increased significantly. It is concluded that this technique of co-ordinated cross-year succession regulation of reservoir channel sediment is realistic and feasible for the current river. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Water Conservancy Science & Techonlogy & Economy is the property of Water Conservancy Science & Technology & Economy Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

By collecting the sea gale, water depth and dredging daily report of Guoneng Huanghua Port channel from 2017 to2021, the seasonal distribution of strong wind and corresponding wind energy was calculated, and the temporal and spatial distribution characteristics of siltation in the channel in recent years and its correlation with wind energy were analyzed. The results show that the siltation volume of the channel in recent five years is 15 million m³ to 32 million m³, and the average siltation intensity of the whole channel in five years is 1.80 m, of which the maximum is 2.59 min 2018. The siltation outside the shield section is significantly greater than that inside the shield section. The strong siltation section is distributed near the entrance. Corresponding to W6+0-W24+0 section, the maximum siltation occurs in W9+0-W13+0 section, and the maximum annual siltation intensity is 7.83 m of W12+0 section in 2021. Channel siltation is mainly concentrated in spring and autumn, and the weakest in summer. In terms of time distribution, except for the influence of typhoon, it is consistent with the seasonal distribution of gale wind energy; gale is the main inducement of channel siltation, and there is a certain correlation between channel siltation and energy generated by gale. [ABSTRACT FROM AUTHOR]

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Multi-modal medical image fusion technology is currently mostly used for clinical diagnosis, pathological change tracking and treatment, and radiotherapy, but the combined intelligent robotic arm assisted vertebral body augmentation is rarely used in clinical application. OBJECTIVE: To evaluate the safety and effectiveness of multi-modal image fusion combined with intelligent robotic arm assisted in establishing vertebral augmentation channels. METHODS: Sixty-two patients with osteoporotic vertebral compression fracture vertebral augmentation were included in this study and randomly divided into two groups. The 31 cases in the trial group underwent multi-modal image fusion by mechanical arm to build the vertebral strengthening channel. The 31 cases in the control group underwent conventional method to establish the vertebral strengthening channel. Vertebral augmentation was performed with the same bone cement injection under the same rules. The number of intraoperative index, postoperative pain score, and number of re-fractures of injured vertebrae were recorded. Statistical analysis was conducted to evaluate the results. RESULTS AND CONCLUSION: (1) The puncture time, fluoroscopy times, total dose of radiation exposure, puncture adjustment times, bone cement leakage, positioning time, and visual analogue scale score of pain 1 day after operation in the trial group were significantly lower than those in the control group (P < 0.001). The excellent and good rates of puncture accuracy, bone cement injection volume, and bone cement dispersion were significantly higher in the trial group than those in the control group (P < 0.001). The number of positioning fluoroscopy was not significantly different between the two groups. (2) No infection occurred in patients of the two groups. In the control group, one patient was found with cement emboli in the double pulmonary arteries; one patient had no long-term relief of postoperative pain; and three patients were diagnosed with re-fracture of injured vertebra due to pain reissue MRI examination within 6 months. No such complications were seen in the trial group during follow-up. (3) It is concluded that the establishment of vertebral enhancement channel assisted by multi-modal image fusion and intelligent robotic arm can improve the accuracy of pedicle localization and puncture and the effect of vertebral augmentation, and effectively reduce the number of fluoroscopy, radiation exposure dose and the occurrence of complications; it is safe and reliable. [ABSTRACT FROM AUTHOR]

In order to solve the adverse effect that the lining of high groundwater level channels was prone to damage when subjected to heavy rainfall, the response law of internal structural state of high groundwater level channels under different rainfall conditions was studied. Based on the non-seepage seepage theory, the seepage pressure（total water head） in the tunnel under four different rainfall types was analyzed and studied. The results show that the most unfavorable rainfall types for the lining structure safety are the frontal rainfall and uniform type rainfall. On the basis of seepage analysis and Morgenstern-Price method, the slope stability analysis of the channel slope was carried out. The results show that the slope safety factor decreases continuously with the continuous rainfall. At the same time, the risks of landslide about front type and uniform type rainfall are greater than that in the other two types of rainfall. Therefore we should pay more attention to the front type and uniform type rainfall from the perspective of seepage and slope stability calculation. On this basis, the drainage design of the channel is further optimized and improved, and the proposed scheme can effectively reduce the seepage pressure inside the channel. The research results can provide reference for slope and seepage control design of high groundwater level channels. [ABSTRACT FROM AUTHOR]

A drainage blanket is an important way to eliminate underground seepage. At present, the re a re no systematic fluid-solid coupling results of drainage blankets with no-sand concret e drainage in high groundwater level channels, and the mechanical properties of drainage blankets with no-sand concrete at high groundwat er level are not clear, which restricts their engineering application. Based on the results of the mixing ratio test of drainage blankets with no-sand concret e drainage, using the fluid-solid coupling theory and finite element analysis method, the construction and ope ration of the channel at a high groundwate r level were simulated. The seepage and stress characteristics of drainage blankets with no-sand concrete drainage in high groundwater level channel were revealed. The results show that the no-sand concrete drainage can effectively eliminate the underground seepage of the channel, effectively avoid the loss of rock and soil particles, and the stress of the drainage blankets with no-sand concrete drainage is in a safe state, which can ensure the safety of the channel engineering d uring the construction and operation pe riods. The results have been successfully applied to the channel construction of the shale section at a high groundwat er level in Baoli section of the main channel of South-to-North Water Transfer Project, and can also be used for references in the construction of channels at a high groundwater level and similar projects. [ABSTRACT FROM AUTHOR]

In the Xuwei port area channel of the Lianyungang Port 300 000 DWT channel phase II project, about 40 million m3 of sediment needs to be reclaimed to Xuwei landfill site by disposal & hydraulic -filling process. The sediment storage pit needed by the process is usually located in the shallow nearby the reclamation area. However, due to some uncertain factors, in order to meet the needs of engineering construction, combined with the engineering characteristics and the construction conditions of the reclamation area under construction in the port area, it innovatively proposes that the sediment storage pit is arranged in the reclamation area of the container berth in Xuwei port area, which has obtained the sea area use certificate and is constructed simultaneously. Through the use of the time window before the closure of the dike, the operation of filling to the Xuwei landfill site is realized. Considering both duration and safety, combined with the safety facors, it also proposes the specific layout of sediment storage pit. The application shows that the whole project has been carried out smoothly, it has provided good operating conditions, high efficiency, low loss rate, and good implementation effect of sediment storage pit. The innovation and application experience can be used for reference by similar dredging and reclamation projects. Key words：Lianyungang Port; 300 000 DWT; channel; disposal & hydraulic-filling process; sediment storag [ABSTRACT FROM AUTHOR]

Image caption generation makes machine to automatically describe the content of an image, which belongs to a crossing domain of computer vision and natural language processing. Traditional algorithms based on attention mechanism focus on the different sub-regions of the feature maps, without considering the different channels of feature maps, which is easy to cause attention deviation. To solve this problem, the proposed model assigned corresponding weights to different channel feature maps by the degree of coupling between the currently embedded word and the state of the hidden layer, and combined it with the traditional method as a fusion attention mechanism to accurate! y locate the attention position. The experimental results have a certain improvement on the specified evaluation method, indicating that the model can generate more fluent and accurate natural sentences. [ABSTRACT FROM AUTHOR]

Copyright of Electronic Components & Materials is the property of Electronic Components & Materials and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ballistics / Dandao Xuebao is the property of Journal of Ballistics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper classified, sorted and summarized the stability types of the Yellow River estuarine channel into the sea and briefly re-viewed the evolution and determination process of the standard threshold of artificial avulsion. In addition, the threshold system for the implementation of the flow path avulsion into the sea was initially constructed. The threshold value of water level, river length, sea area sediment capacity and the threshold value of allowable cumulative sediment volume in estuary were analyzed and calculated by the measured data. The results show that the threshold of current water level is 10.58 m when the current flow reaches 3 000 m3 / s, the threshold of river length is 89 km, the threshold of sea area sediment capacity is 7.219 billion m3 and the corresponding threshold of cumulative sediment inflow at Lijin Station is about 12.065 billion tons. [ABSTRACT FROM AUTHOR]

The sinkage and trim in shallow and narrow channel affect the ship's operation and navigation safety directly. At present, there is no practical research results on the sinking of inland ships at home and abroad. In this paper, a generalized physical model was used to study the sinking of 1 000-3 000 dwt ships in restricted inland waterway under different channel width, water depth and speed, the main factors that affect the settlement were analyzed, the empirical formula was compared with the measured settlement, and the calculation formula of the settlement suitable for inland river ships was put forward, which can be used as a reference for ship handling and channel section design. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Remote Sensing is the property of Editorial Office of Journal of Remote Sensing & Science Publishing Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The channel ofthe Yellow River in Yinchuan Plain of Ming Dynasty shifted and twisted frequently. By combining culture documen­tary^ and referring to relevant materials such as archaeological discoveries as well as natural geography，the author probed into the south and north sections of the Yellow- River in Yinchuan Plain step by step. The overall research involved the damage and construction of Lingzhou City in three times，the distribution of littoral archaeological sites in Yinchuan plain before and within Ming Dynasty and the spatial location of Hezhongbao，Gaotai Temple and Shengwei City. Then， the author made a rough outline picture of the channel in Yinchuan Plain of the Yellow River in Ming Dynasty. [ABSTRACT FROM AUTHOR]

Concrete channel could heave and even fail in winter under the combined impact of frozen-thawing, temperature fluctuation and mechanical stresses. Understanding the mechanisms underlying the failure of lining structure of the concrete channel is hence important. Taking trapezoidal concrete channel as an example, a numerical model was developed in this paper based on heat-moisture-stress theory, capillary force and water flow in soil to calculate the impact of these factors on concrete channel. In the model, the temporal change in temperature on the channel surface was treated as the top boundary and the groundwater table as the bottom boundary where the temperature remains stable. The multifield coupling software COMSOL was used to simulate potential occurrence of heaves in soil induced by frost. We simulated a 67-day heaving process induced by frost in the foundation soil and obtained the final heave simultaneously by solving the partial differential equations in COMSOL. Based on the results, the finite element software ABAQUS was used to simulate the nonlinear mechanical behavior of the contacts between the concrete lining and the soil, as well as the contacts between the molded bag concrete and the soil using different contact models. The stress and displacement at different location on the contacts were calculated using the ABAQUS. The result showed that: 1) the frost-induced heave varied spatially in the channel. The worst occurred at the center of the channel bottom and on the 1/3 the slope length (measured from the slope tip), and the least was on the top of the channel. 2) If the failure criterion was defined as when the concrete lining reached its plastic stage, the maximum non-uniform heave calculated by the ABAQUS was 2.98 cm for the traditional concrete lining. 3) Compared with traditional concrete lining, the molded bag concrete substantially reduced the force between the lining and the soil. This changed the mechanical behavior of their contact, thereby effectively reducing the stress on the molded bag concrete lining. The maximum stress on the top surface of the molded bag concrete lining was only 1/250 that in the traditional concrete lining, effectively improving its adaptability to uneven frost heave in seasonal frozen soil. The simulation results are in good agreement with experimental data and have implications for designing trapezoidal channels in seasonal frozen regions. [ABSTRACT FROM AUTHOR]

During the 2018 flood season, the flood discharging to the downstream of the Yellow River totals 22.2 billion m3, and the desilting from Xiaolangdi Reservoir reaches to 466 million tons, the deposition of watercourses above Sunkou is 256.1 million tons, of which, 192 million tons in the channel above Huayuankou. This is the highest and the maximum year in quantity of water, sediment discharge and deposition of the lower reaches since the operation of Xiaolangdi Reservoir. However, the flood level of the same discharge in watercourses above Huayuankou which has the highest sediments during the desilting declines instead of increasing. This article analyzed the erosion and deposition and relevant characteristics, the changes of water level with the same discharge along cross sections at hydrologic stations as well as the changes of water level with the same discharge of water gauge at vulnerable spots during floods and sediment discharge in July by using sediment method and cross-section method. The outcomes show that a large amount of sediment occur in branch channels and marginal bank of watercourses above Huayuankou, after floods have passed, main channels seem more obvious with concentrated rivers, higher velocity and lower river level with the same discharge. After July floods, the river level of the same discharge along cross-section in the downstream of Yellow River rises slowly, which yet still remains below that at the beginning. During 2018 flood season, the flood discharge has been found no obvious reduction in watercourses of the downstream of Yellow River. [ABSTRACT FROM AUTHOR]

The river regulation work of the lower Yellow River is a complex systematic project. It is not only influenced by those boundary conditions of societies, environments and incoming water and sediment volumes outside the system, but also restricted by the relations of floodplain and main-channel inside. In recent decades, many researchers have done much work from different layers and aspects on this issue. This paper introduced the research progress of the theory and technology on synergistic regulation for floodplain and main-channel of the lower Yellow River and put forward the strategy and methodology of synergistic regulation for floodplain and main-channel to adapt the future boundary conditions of nature, societies and environments, which might solve the conflict between flood prevention and social-economic development in the floodplain and achieve a harmonious state finally. [ABSTRACT FROM AUTHOR]

Lingding Bay has two main huh ports and connected deep water waterways in South China. Maintaining the stable pattern of "three heaches and two troughs" is the key hasis for the Western trough deepwater waterways development in Cuangzhou Port. Since 2008, due to artificial sand digging on the middle beach, three huge sand pits with total volume of 7 × 108 m3 has been formed, which directly affects the evolution of the beach and trough in Lingding Bay. By means of field investigation and numerical simulation, the influence of sand mining on surrounding water body and topography is analyzed. It is pointed out that the sediment concentration in the sediment digging area can increase greatly from 0.2 kg/m3 to 1.5-2.8 kg/m3 (up to 5 kg/m3). This will increase the deposition of the nearby seabed and also affect the waters of the Hong Kong-Zhuhai-Maeao Bridge. The influence of hydrological factors on the formation of sand pits are calculated. The results show that the main changes of tide level, tidal current and tidal volume are in the sand pit and its adjacent waters. The main changes are the tidal level decreases (less than 1cm), the tidal current decreases, and sediment deposition is mainly in the sand pit (33 cm/a). The seabed around the pit is scoured, and the scour in the south side is larger. At present, sand pits are mainly silted up, and the time of silting back is expected to take 20 years. When 2#, 3# sand pits or 2#, 4# sand pits are connected, it is possible to form a new tidal current channel, change the existing pattern of "three beaches and two troughs", and have a negative impact on the existing channel maintenance and port production. [ABSTRACT FROM AUTHOR]

Copyright of Nanning Zhiye Jishu Xueyuan Xuebao is the property of Nanning College for Vocational Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In view of the problem of frosl heaving and damage of rigid lining channel, the lining channel ofYanhuanding irrigation area in Ningxia was selected as the research object. On the basis of the model considering phase change and water transfer, the influence of high ground water level on the frost heave was considered, a mathematical physical model considering water migration and the influence of groundwater was established and Comsol Mutiphysios was adopted. The finite element software was used to numerical simulate the frost heaving of the concrete lining of the trapezoid channel and the frosl heaving damage of ihe rigid lining channel was studied and analyzed from the temperature field, the displacement field and the stress field respectively. The results show that the frost heaving amount of shady slope and sunny slope is large and the canal bottom is small. In the middle of the canal bottom, the frost heaving amount at the length of 1/3 of the canal slope reaches the maximum value respectively. The normal frost heave force in the middle of the canal bottom is smaller, the sides increase gradually, the normal frost heave force distribution on the shady slope and sunny slope is uniform and the tangential freezing force at the bottom of the canal is linearly distributed. The shady slope and the sunny slope close to the foot of the slope have a greater tangential freezing force, while the tangential freezing force is less at the top of the slope on the right and left ends, the bottom lining slab and the two lining slab are bent and combined deformation members. The correlative research can provide beneficial reference for the treatment of frost heaving damage and protection of lining channels in cold and dry irrigation areas. [ABSTRACT FROM AUTHOR]

In view of the current situation in the Lower Yellow River, two models of the treatment nf the current wiile river and the narrow river with protected dykes, a one-dimensional non-constant water anil sand mathematical model was built based on the characteristics of the Yellow River with high sediment concentration, diverse water and sand combinations and complex terrain boundaries. The calculation formulas of water flow sediment carrying capacity, gradation of sediment carrying (rapacity level, sediment recovery saturation coefficient, the resistance of moving bed and gradation of sediment and river bed were selected and applied to the model construction. A dynamic correction method for calculating exit liouiidary was promised based on the calculation of long series water and sand conditions. The model was verified by measuring water and sand, gradation, water and sediment variation of cross section in the Lower Yellow River from 1976 to 2010. The results show that the model verification can reflect the changes of the whole series of floods in the Lower Yellow River. [ABSTRACT FROM AUTHOR]

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The change of river section in the Lower Yellow River is directly related to the discharge capacity of river, and the change of cross section shape on the curvature of channel is related to the change of river regime. Based on the cross section data during deposition period from 1986 to 1999 and erosion period from 2000 to 2013, the deposition and erosion of river cross-sections in the Lower Yellow River was analyzed respectively. Based on theoretical analysis, the relation of the cross-sectional shape and the bend curvature was given. Finally, the effect of the change of cross-section shape on the curvature in the Lower Yellow River was analyzed. The results show that， during the erosion period, the main channel width gradually increases(under ideal conditions), the channel will become wider and shallower, the lateral distribution of the flow velocity in the curved channel is not uniforn, which is easy to cause the erosion of the bank, and the channel will be more curved. [ABSTRACT FROM AUTHOR]

In this paper, The FLUNET numerical simulation software was used to establish two-dimensional model, loading velocity, pressure and wall roughness. The flow field of the channel was calculated by using FLUENT numerical simulation software to calculate the flow field of the same flow rate and section velocity profile. The relationship between flow rate, flow velocity and roughness was studied in order to provide the basis for choosing the roughness coefficient correctly in practice. The results show that for the concrete bag lining channel, flow velocity and discharge are the factors of roughness. Through data correlation analysis, roughness is negatively correlated with velocity and discharge,the velocity gradually increases along the direction of the channel's bottom, but the maximum velocity occurs below the water surface and the lateral flow from the channel wall to the central flow, resulting in a larger velocity concentrated in the middle area. [ABSTRACT FROM AUTHOR]

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As the new market shrink，some new product market become even to zero，the marketing strategy goal transfer from acquisition to customer retention in the telecom enterprise.Because of the gap between the retention marketing goal and the marketing reality，it was discussed how the telecom company could develop data-driven marketing of retention.Firstly，design the ability architecture of data-driven retention marketing IT system.Secondly，distinct and establish the management and operational process of retention marketing.Thirdly，establish the two foundation databases，one is the customer needs’ labels database，and the other is marketing and campaign resources database.Fourthly，improve and establish the three kinds of core abilities-including the ability of allocation of marketing resource for the customer needs，the ability of the channel triggering and the ability of the visual management of retention marketing.

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Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The problem of minimum latency data aggregation scheduling in single-radio single-channel wireless sensor networks is a NPC problem and many solutions have been proposed.In multi-radio multi-channel networks,the latency may be lower as a node may receive transmission data from other different nodes simultaneously.It formulates the minimum latency data aggregation scheduling into an optimization problem with joint consider of tree structure,time slot assignment,channel assignment and radio assignment.The problem is divided into constructing data aggregation tree and designing a node schedule subproblems.For each subproblem,heuristic algorithm has been proposed.The simulation results show that the proposed algorithm achieve good performance.

Copyright of Journal of PLA University of Science & Technology (Natural Science Edition) / Jiefangjun Ligong Daxue Xuebao is the property of Magazine of PLA University of Science and Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A channel assigning scheme which was adapted to LEO constellation communication system was proposed. The scheme provided reserved channel for handover call to reduce blocking probability of handoff call.Meanwhile, new call queuing strategy was adopted to restrain new call balockage deterioration caused by reserving scheme. When there was a departure of ongoing call, new call in queue could obtain channel assigning priority-ranked. It is shown that the scheme can reduce the handoff call blocking probability observably, and new call blocking probability is improved at the same time.

The tide riding water level has great influence on improving the safety of navigation and the operation efficiency of the wharf for the port where the ships need to take ride when navigating. In this paper, we proposed the calculation method of the tide riding water level for the port with large flow which took the flow conditions in front of the wharf into consideration. As an example, this method was applied in the extension project of Majishan 250 thousand ton ore transfer port when calculating the design channel bottom elevation. Firstly, we analyzed the flow conditions in front of the wharf, and then put forward different schemes of entering port and berthing at dock, and calculated the corresponding tide riding water levels. Through comprehensive comparison and in order to improve the ship loading rate and the operation efficiency of the wharf, we adopted the tide riding water level corresponding to the scheme of entering port at the ebb and berthing at the minimum ebb. The securities of navigation and berthing were both taken into account in this method and it can make the channel design more economical and reasonable. [ABSTRACT FROM AUTHOR]

The awareness of male skincare has been increasing in recent years, as male consumers are more concerned with their public appearance. The cosmetic factories, traditionally manufacturing female cosmetic products, have now entered into research, developing, and producing male skincare products. As a result, the male skincare products have fast expanded their shelf space in retail outlets. Obviously, there is a lucrative commercial potential in this business area. This study focuses on identifying the factors impacting the purchasing intention of male skincare product consumers. After extensive literature reviews, types of channel, product involvement, and perceptive risk are identified as independent variables which have significant influence on the purchasing intention of male skincare product consumers. Four hundred and twelve valid questionnaires were collected and coded for hypotheses testing by utilizing the regression model analysis. Three findings emerge from the analysis: (1) The physical channel has higher influence on the purchasing intention of male skincare products than the virtual channel; (2) The product involvement level has a positive impact on the purchasing intention of male skincare product; (3) The negative influence of perceived risk on the purchasing intention of male skincare product is not supported. Managerial implications and future research directions are suggested. [ABSTRACT FROM AUTHOR]

Currently, the brand competition has become the focus of competition among TV channels. In this paper, the research will be carried out from four angles, which are brand position, content development, image building and brand extension. The study found that in the process of building the brand, Hubei Longshang channel has achieved the transformation from the television media industry chain to the integration services industrial chain. On the base of media platform and on the support of offline industry chain, Hubei Longshang channel develops a unique path of brand building, that is combination of online channel and offline channels. This path has become a beneficial breakthrough of brand building of agricultural TV channels in our country. [ABSTRACT FROM AUTHOR]

The channel capacity will be greatly influenced in the environment where was surrounded by large amount of scatters, so a new channel model was proposed which based on dynamic MIMO scattering wireless channel. The influence on wireless channel capacity was analyzed which was brought by mobile terminal, and the promotion brought by the antenna selection during moving was discussed. The simulation results show that the channel capacity will become larger with the antenna spacing and expansion angle increase. The channel capacity is lower in mobile environment than that in semi-static environment, and the antenna selection can improve the system capacity effectively. [ABSTRACT FROM AUTHOR]